Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Peerless Boilers · Series
The Series MI-e is Peerless' current residential cast-iron, natural-draft gas hot water boiler at 84% AFUE (DOE 2021 compliant): seven fixed-input sizes MI-e-03 through MI-e-09 from 70 to 280 MBH input on the Hydrostat IC integrated boiler control with spark ignition, integral low water cut-off and boiler reset.
Series facts
The MI-e ratings table prints 84.6% AFUE on MI-e-03/-04, 84.5% on MI-e-05 and 84.3–84.4% on the larger sizes; the product page headlines 84% AFUE with DOE-2021 minimum-efficiency compliance.
The Series MI-e is Peerless' current residential cast-iron gas hot water boiler, listed under Residential Boilers – Gas Boilers on the official site. The product page describes an 84% AFUE boiler that meets the Department of Energy 2021 minimum efficiency requirement, fully packaged for natural draft chimney applications, with a Hydrostat IC Integrated Boiler Control providing dependable spark ignition, low water cut-off and boiler reset, plus two circulator outputs for domestic hot water priority/heating zone. A front-facing integral draft diverter keeps the profile low for tight spaces with low ceilings, a steel jacket reduces heat loss, and flame rollout shut-off switch, vent safety switch, automatic vent damper and temperature-pressure gauge are standard.
The MI-e ratings table covers seven fixed-input sizes from MI-e-03 to MI-e-09: inputs 70 to 280 MBH with heating capacities of 60 to 236 MBH, net water ratings of 52 to 205 MBH (piping and pickup allowance 1.15) and AFUE of 84.3–84.6%, with boiler water content of 4.72 to 12.40 US gallons per the table on the product page.
The official catalogue pairs the MI-e with the near-identical Series MI-x (seven sizes MI-x-03 through MI-x-09, 70–280 MBH input, outputs 59–234 MBH, water content 2–8 US gallons), which shares the Hydrostat IC platform. Boilers.ca documents the seven MI-e models at model level; the sibling MI-x line is covered by this hub's copy without separate model pages. No official Canadian-sales statement was found — research reviewed US-site data only — so canadianStatus stays 'unknown'.
Highlights
Models
One canonical page per model with input, output and efficiency kept separate.
Peerless Boilers
The Peerless Series MI-e MI-e-03 is the smallest size of the 84%-class cast-iron gas water line: a fixed 70 MBH input for 60 MBH heating capacity and a 52 MBH net water rating at 84.6% AFUE, with 4.72 US gallons of boiler water content, on the Hydrostat IC natural-draft platform.
Peerless Boilers
The Peerless Series MI-e MI-e-04 is a 105 MBH mid-small size of the 84%-class cast-iron gas water line: a fixed 105 MBH input for 89 MBH heating capacity and a 77 MBH net water rating at 84.6% AFUE, with 6 US gallons of boiler water content, on the Hydrostat IC natural-draft platform.
Peerless Boilers
The Peerless Series MI-e MI-e-05 is a 140 MBH mid size of the 84%-class cast-iron gas water line: a fixed 140 MBH input for 119 MBH heating capacity and a 103 MBH net water rating at 84.5% AFUE, with 7.28 US gallons of boiler water content, on the Hydrostat IC natural-draft platform.
Peerless Boilers
The Peerless Series MI-e MI-e-06 is a 175 MBH mid-large size of the 84%-class cast-iron gas water line: a fixed 175 MBH input for 148 MBH heating capacity and a 129 MBH net water rating at 84.4% AFUE, with 8.56 US gallons of boiler water content, on the Hydrostat IC natural-draft platform.
Peerless Boilers
The Peerless Series MI-e MI-e-07 is a 210 MBH large size of the 84%-class cast-iron gas water line: a fixed 210 MBH input for 178 MBH heating capacity and a 155 MBH net water rating at 84.4% AFUE, with 9.84 US gallons of boiler water content, on the Hydrostat IC natural-draft platform.
Peerless Boilers
The Peerless Series MI-e MI-e-08 is a 245 MBH large size of the 84%-class cast-iron gas water line: a fixed 245 MBH input for 207 MBH heating capacity and a 180 MBH net water rating at 84.3% AFUE, with 11.12 US gallons of boiler water content, on the Hydrostat IC natural-draft platform.
Peerless Boilers
The Peerless Series MI-e MI-e-09 is the largest MI-e of the 84%-class cast-iron gas water line: a fixed 280 MBH input for 236 MBH heating capacity and a 205 MBH net water rating at 84.3% AFUE, with 12.4 US gallons of boiler water content, on the Hydrostat IC natural-draft platform.
| Specification | Peerless Series MI-e MI-e-03 | Peerless Series MI-e MI-e-04 | Peerless Series MI-e MI-e-05 | Peerless Series MI-e MI-e-06 | Peerless Series MI-e MI-e-07 | Peerless Series MI-e MI-e-08 | Peerless Series MI-e MI-e-09 |
|---|---|---|---|---|---|---|---|
| input-min | — | — | — | — | — | — | — |
| input-max | — | — | — | — | — | — | — |
| output-max | — | — | — | — | — | — | — |
| Efficiency (AFUE) | 84.6 % | 84.6 % | 84.5 % | 84.4 % | 84.4 % | 84.3 % | 84.3 % |
| turndown | — | — | — | — | — | — | — |
| vent-max-3 | — | — | — | — | — | — | — |
| vent-max-2 | — | — | — | — | — | — | — |
| weight | — | — | — | — | — | — | — |
Read the full comparison: Peerless Series MI-e MI-e-03 vs MI-e-04 →
Read the full comparison: Peerless Series MI-e MI-e-04 vs MI-e-05 →
Read the full comparison: Peerless Series MI-e MI-e-05 vs MI-e-06 →
Read the full comparison: Peerless Series MI-e MI-e-06 vs MI-e-07 →
Error codes and alerts
No alerts documented for this series yet.
Manuals
Where ROMA provides on-site service
On-site service is currently offered in Greater Vancouver, BC, including Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North Vancouver, West Vancouver, New Westminster, Port Coquitlam, Port Moody, Delta, Langley, Maple Ridge, Abbotsford, Chilliwack, White Rock, Pitt Meadows, Tsawwassen, Anmore, Lions Bay, Belcarra, Bowen Island, Mission. Everything else on this site is reference information you can use anywhere in Canada.
Services for Peerless Boilers boilers
No official Canadian-sales statement was found in the official pages and manuals reviewed on September 9, 2026 (US-site data only), so canadianStatus is recorded as 'unknown'. Confirm supply through a licensed distributor.
Seven fixed-input sizes, MI-e-03 through MI-e-09: 70, 105, 140, 175, 210, 245 and 280 MBH input with heating capacities of 60 to 236 MBH and 84.3–84.6% AFUE per the ratings table on the product page.
Both are current 84%-class cast-iron natural-draft gas water boilers on the Hydrostat IC control in the same 70–280 MBH input range. The MI-e is positioned for DOE-2021 compliance (84.3–84.6% AFUE, water content 4.72–12.40 gal) while the MI-x prints a flat 84% AFUE with 2–8 gal water content; Boilers.ca documents the MI-e at model level and covers the MI-x in this hub's copy.
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On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
Sources and verification
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.